21320131

素因数分解:

$7^1\times {\mathrm{43}}^1\times {\mathrm{193}}^1\times {\mathrm{367}}^1$

素因数の和:610

約数の個数: 16

約数和(自身を含む): 25129984

約数和(自身を除く): 3809853

約数列:

[1, 7, 43, 193, 301, 367, 1351, 2569, 8299, 15781, 58093, 70831, 110467, 495817, 3045733, 21320131]

約数ペア:

[(1, 21320131), (7, 3045733), (43, 495817), (193, 110467), (301, 70831), (367, 58093), (1351, 15781), (2569, 8299)]